With reference to trails and services, which of the following sentences is correct?

Question

luigi catalano · Accepted Answer

Services are transported over trails; that is, services are clients with respect to trails.

luigi catalano · Answer

Trails are transported over services; that is, trails are clients with respect to services.

luigi catalano · Answer

A trail can interconnect three ports, while a service always two.

luigi catalano · Answer

A service is always associated to a single wavelength, while a trail can involve multiple wavelengths.

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